Wemmer, Klaus

[["dc.bibliographiccitation.journal","Precambrian Research"],["dc.contributor.author","Oyhantçabal, P."],["dc.contributor.author","Oriolo, S."],["dc.contributor.author","Basei, M. A. S."],["dc.contributor.author","Frei, D."],["dc.contributor.author","Klaus, J."],["dc.contributor.author","Wemmer, Klaus"],["dc.contributor.author","Siegesmund, Siegfried"],["dc.date.accessioned","2022-03-23T08:36:37Z"],["dc.date.available","2022-03-23T08:36:37Z"],["dc.date.issued","2016"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/105045"],["dc.relation.orgunit","Abteilung Strukturgeologie und Geodynamik"],["dc.title","Provenance and tectonic affinity of metasedimentary rocks of the western Dom Feliciano Belt in Uruguay: Insights from U-Pb detrital zircon geochronology, Hf isotopes, Sm-Nd whole-rock model ages and geochemical data"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","141"],["dc.bibliographiccitation.issue","1-4"],["dc.bibliographiccitation.journal","Lithos"],["dc.bibliographiccitation.lastpage","159"],["dc.bibliographiccitation.volume","98"],["dc.contributor.author","Oyhantcabal, Pedro"],["dc.contributor.author","Siegesmund, Siegfried"],["dc.contributor.author","Wemmer, Klaus"],["dc.contributor.author","Frei, Robert"],["dc.contributor.author","Layer, Paul"],["dc.date.accessioned","2018-11-07T10:58:15Z"],["dc.date.available","2018-11-07T10:58:15Z"],["dc.date.issued","2007"],["dc.description.abstract","In the southernmost Dom Feliciano Belt of Uruguay, highly fractionated calc-alkaline granites, mildly alkaline granites, shoshonitic volcanics, and peralkaline intrusions and volcanics are spatially and temporal associated with the evolution of shear zones. Four representative magmatic unites of this diverse association were petrographic and geochemically investigated: the Solis de Mataojo Complex, a medium to high K2O calc-alkaline granite with signature typical of mature continental arcs and post-collisional settings; the Maldonado granite, highly fractionated calc-alkaline to alkaline, with characteristics that are transitional between both types of series; the Pan de Azucar Pluton, with characteristics typical of post-collisional alkaline granites and the Las Flores shoshonitic basalts. Geochemistry and geotectonic setting point out that slab breakoff was most likely the mechanism associated with the generation of high-K calc-alkaline magmas (Solis de Mataojo and Maldonado) shortly after collision. Extension associated to the formation of molassic basins and emplacement of dolerites and basalt flows with shoshonitic affinity (Las Flores) 15and finally a shift to magmas with alkaline signatures (Pan de Azucar) simultaneous with a second transpressional phase were probably linked with lithospheric thinning through delamination. This evolution took place between 615 and 575 Ma, according to available data. Contrary to previous proposals, which considered this magmatism to represent the root of a continental magmatic are, a post-collisional environment, transitional from orogenic to anorogenic, during transcurrent deformation is proposed. (c) 2007 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.lithos.2007.03.001"],["dc.identifier.isi","000250247200007"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/50436"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0024-4937"],["dc.relation.orgunit","Abteilung Strukturgeologie und Geodynamik"],["dc.title","Post-collisional transition from calc-alkaline to alkaline magmatism during transcurrent deformation in the southernmost Dom Feliciano Belt (Braziliano-Pan-African, Uruguay)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","453"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Tectonics"],["dc.bibliographiccitation.lastpage","472"],["dc.bibliographiccitation.volume","32"],["dc.contributor.author","Loebens, Stefan"],["dc.contributor.author","Sobel, Edward R."],["dc.contributor.author","Bense, Frithjof A."],["dc.contributor.author","Wemmer, Klaus"],["dc.contributor.author","Dunkl, Istvan"],["dc.contributor.author","Siegesmund, Siegfried"],["dc.date.accessioned","2018-11-07T09:23:49Z"],["dc.date.available","2018-11-07T09:23:49Z"],["dc.date.issued","2013"],["dc.description.abstract","The Sierra de Aconquija and Cumbres Calchaquies in the thick-skinned northern Sierras Pampeanas, NW Argentina present an ideal setting to investigate the tectonically and erosionally controlled exhumation and uplift history of mountain ranges using thermochronological methods. Although these ranges are located along strike of one another, their spatiotemporal evolution varies significantly. Integrating modeled cooling histories constrained by K-Ar ages of muscovite and biotite, apatite fission track data as well as (U-Th)/He measurement of zircon and apatite reveal the structural evolution of these ranges beginning in the late stage of the Paleozoic Famatinian Orogeny. Following localized rift-related exhumation in the central part of the study area and slow erosion elsewhere, growth of the modern topography commenced in the Cenozoic during Andean deformation. The main activity occurred during the late Miocene, with varying magnitudes of rock uplift, surface uplift, and exhumation in the two mountain ranges. The Cumbres Calchaquies is characterized by a total of 5-7km of vertical rock uplift, around 3km of crestal surface uplift, and a maximum exhumation of 2-4km since that time. The Sierra de Aconquija experienced 10-13km of vertical rock uplift, similar to 4-5km of peak surface uplift, and 6-8km of exhumation since around 9Ma. Much of this exhumation occurred along a previously poorly recognized fault. Miocene reactivation of Cretaceous rift structures may explain along-strike variations within these ranges. Dating of sedimentary samples from adjacent basins supports the evolutionary model developed for the mountain ranges."],["dc.identifier.doi","10.1002/tect.20038"],["dc.identifier.isi","000322124300010"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/29676"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0278-7407"],["dc.relation.orgunit","Abteilung Strukturgeologie und Geodynamik"],["dc.title","Refined exhumation history of the northern Sierras Pampeanas, Argentina"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","265"],["dc.bibliographiccitation.lastpage","273"],["dc.contributor.author","Steenken, A."],["dc.contributor.author","López de Luchi, M. G."],["dc.contributor.author","Martino, R. D."],["dc.contributor.author","Siegesmund, Siegfried"],["dc.contributor.author","Wemmer, Klaus"],["dc.date.accessioned","2022-03-22T13:47:28Z"],["dc.date.available","2022-03-22T13:47:28Z"],["dc.date.issued","2005"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/104982"],["dc.relation.ispartof","Actas del XVI Congreso Geológico Argentino, La Plata Actas 1"],["dc.relation.orgunit","Abteilung Strukturgeologie und Geodynamik"],["dc.title","SHRIMP dating of the El Peñón granite: a time marker at the turning point between the Pampean and Famatinian cycles within the Conlara Metamorphic Complex (Sierra de San Luis; Argentina)"],["dc.type","book_chapter"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","119"],["dc.bibliographiccitation.lastpage","122"],["dc.contributor.author","Martino, R."],["dc.contributor.author","Guereschi, A."],["dc.contributor.author","Wemmer, Klaus"],["dc.contributor.author","Lopez de Luchi, M."],["dc.contributor.author","Steenken, A."],["dc.contributor.author","Siegesmund, Siegfried"],["dc.date.accessioned","2022-03-21T16:00:25Z"],["dc.date.available","2022-03-21T16:00:25Z"],["dc.date.issued","2006"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/104976"],["dc.relation.ispartof","Proc. of the V South Ameriacn Symposium on Isotope Geology"],["dc.relation.orgunit","Abteilung Strukturgeologie und Geodynamik"],["dc.title","Cooling ages constraints on the tectonic activity of the Los Tuneles shear belt, Eastern Pampeanas ranges of Cordoba, Argentina"],["dc.type","book_chapter"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1227"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","International Journal of Earth Sciences"],["dc.bibliographiccitation.lastpage","1246"],["dc.bibliographiccitation.volume","99"],["dc.contributor.author","Oyhantcabal, Pedro"],["dc.contributor.author","Siegesmund, Siegfried"],["dc.contributor.author","Wemmer, Klaus"],["dc.contributor.author","Layer, Paul"],["dc.date.accessioned","2018-11-07T08:39:45Z"],["dc.date.available","2018-11-07T08:39:45Z"],["dc.date.issued","2010"],["dc.description.abstract","The Sierra Ballena Shear Zone (SBSZ) is part of a high-strain transcurrent system that divides the Neoproterozoic Dom Feliciano Belt of South America into two different domains. The basement on both sides of the SBSZ shows a deformation stage preceding that of the transcurrent deformation recognized as a high temperature mylonitic foliation associated with migmatization. Grain boundary migration and fluid-assisted grain boundary diffusion enhanced by partial melting were the main deformation mechanisms associated with this foliation. Age estimate of this episode is > 658 Ma. The second stage corresponds to the start of transpressional deformation and the nucleation and development of the SBSZ. During this stage, pure shear dominates the deformation, and is characterized by the development of conjugate dextral and sinistral shear zones and the emplacement of syntectonic granites. This event dates to 658-600 Ma based on the age of these intrusions. The third stage was a second transpressional event at about 586 to < 560 Ma that was associated with the emplacement of porphyry dikes and granites that show evidence of flattening. Deformation in the SBSZ took place, during the late stages, under regional low-grade conditions, as indicated by the metamorphic paragenesis in the supracrustals of the country rocks. Granitic mylonites show plastic deformation of quartz and brittle behavior of feldspar. A transition from magmatic to solid-state microstructures is also frequently observed in syntectonic granites. Mylonitic porphyries and quartz mylonites resulted from the deformation of alkaline porphyries and quartz veins emplaced in the shear zone. Quartz veins reflect the release of silica associated with the breakdown of feldspar to white mica during the evolution of the granitic mylonites to phyllonites, which resulted in shear zone weakening. Quartz microstructures characteristic of the transition between regime 2 and regime 3, grain boundary migration and incipient recrystallization in feldspar indicate deformation under lower amphibolite to upper greenschist conditions (550-400A degrees C). On the other hand, the mylonitic porphyries display evidence of feldspar recrystallization suggesting magmatic or high-T solid-state deformation during cooling of the dikes."],["dc.identifier.doi","10.1007/s00531-009-0453-1"],["dc.identifier.isi","000281026800005"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/6761"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/19071"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1437-3254"],["dc.relation.orgunit","Fakultät für Geowissenschaften und Geographie"],["dc.relation.orgunit","Abteilung Strukturgeologie und Geodynamik"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","The Sierra Ballena Shear Zone in the southernmost Dom Feliciano Belt (Uruguay): evolution, kinematics, and deformation conditions"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","275"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Andean Geology"],["dc.bibliographiccitation.volume","44"],["dc.contributor.author","Bense, Frithjof"],["dc.contributor.author","Costa, Carlos"],["dc.contributor.author","Oriolo, Sebastián"],["dc.contributor.author","Löbens, Stefan"],["dc.contributor.author","Dunkl, Istvan"],["dc.contributor.author","Wemmer, Klaus"],["dc.contributor.author","Siegesmund, Siegfried"],["dc.date.accessioned","2020-12-10T18:47:50Z"],["dc.date.available","2020-12-10T18:47:50Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.5027/andgeoV44n3-a03"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/14893"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/78909"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.intern","Merged from goescholar"],["dc.relation.orgunit","Abteilung Strukturgeologie und Geodynamik"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0/"],["dc.title","Exhumation history and landscape evolution of the Sierra de San Luis (Sierras Pampeanas, Argentina) - new insights from low - temperature thermochronological data"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.journal","International Journal of Earth Sciences"],["dc.contributor.author","Silva Lara, Hernan"],["dc.contributor.author","Siegesmund, S."],["dc.contributor.author","Oriolo, S."],["dc.contributor.author","Hueck, M."],["dc.contributor.author","Wemmer, K."],["dc.contributor.author","Basei, M. A. S."],["dc.contributor.author","Oyhantçabal, P."],["dc.date.accessioned","2022-09-01T09:49:18Z"],["dc.date.available","2022-09-01T09:49:18Z"],["dc.date.issued","2022"],["dc.description.abstract","Abstract\n \n Some recent models challenge the position and extension of the assumed oceanic basins formed through the break-up of Rodinia, and the tectonic processes involved in the Gondwana assembly, making the investigation of the Early Neoproterozoic record of great relevance. Within the South-American Atlantic margin, the Punta del Este Terrane (PET) of the Dom Feliciano Belt (DFB) comprises a unique Tonian to Ediacaran record, and has a strategic position to reconstruct spatio-temporal relationships with the southern African orogenic belts. Novel zircon U–Pb and Lu–Hf data from the PET basement orthogneisses display Tonian magmatic ages (805–760 Ma) and Hf isotopic signatures indicative of mainly crustal/metasedimentary sources, (Nd T\n DM\n ages: 2.2–1.9 Ga, and εHf(t): − 12 to − 4). The basement paragneisses yielded late Paleoproterozoic to Neoproterozoic U–Pb ages, but dominantly positive εHf(t) values. The presented results confirm the correlation of the PET with the Coastal Terrane of the Kaoko Belt, and discard the idea of the Nico Pérez Terrane as a source. Detrital zircon U–Pb and Lu–Hf data from the Rocha Formation yielded a main peak at ca. 660 Ma, with the Neoproterozoic grains showing a εHf(t) between + 1 and + 14. The deposition age of the Rocha Formation is constrained by the youngest detrital zircon age peak (660 Ma), and the beginning of the deposition of the Sierra de Aguirre Formation (580 Ma). The data indicate common sources with the Marmora Terrane, and it is thus proposed that the Rocha Formation belongs to the Gariep Belt, and it was juxtaposed during the Ediacaran to the DFB."],["dc.description.sponsorship"," Deutscher Akademischer Austauschdienst http://dx.doi.org/10.13039/501100001655"],["dc.description.sponsorship"," FAPESP 501100001807"],["dc.description.sponsorship"," Georg-August-Universität Göttingen 501100003385"],["dc.identifier.doi","10.1007/s00531-022-02230-0"],["dc.identifier.pii","2230"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/113386"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-597"],["dc.relation.eissn","1437-3262"],["dc.relation.issn","1437-3254"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","Reassessing the polyphase Neoproterozoic evolution of the Punta del Este Terrane, Dom Feliciano Belt, Uruguay"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","191"],["dc.bibliographiccitation.lastpage","195"],["dc.contributor.author","Steenken, A."],["dc.contributor.author","Lopez de Luchi, M. G."],["dc.contributor.author","Siegesmund, Siegfried"],["dc.contributor.author","Frei, R."],["dc.contributor.author","Wemmer, Klaus"],["dc.date.accessioned","2022-03-22T13:48:27Z"],["dc.date.available","2022-03-22T13:48:27Z"],["dc.date.issued","2006"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/104997"],["dc.relation.ispartof","Proc. of the V South Ameriacn Symposium on Isotope Geology"],["dc.relation.orgunit","Abteilung Strukturgeologie und Geodynamik"],["dc.title","Long lasting high temperature metamorphism in the Sierra de San Luis and its correlation to the amalgamation of the Cuyania Terrane (Argentina)"],["dc.type","book_chapter"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","235"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen"],["dc.bibliographiccitation.lastpage","255"],["dc.bibliographiccitation.volume","256"],["dc.contributor.author","Steenken, Andre"],["dc.contributor.author","Wemmer, Klaus"],["dc.contributor.author","Martino, Roberto D."],["dc.contributor.author","Lopez de Luchi, Monica G."],["dc.contributor.author","Guereschi, Alina"],["dc.contributor.author","Siegesmund, Siegfried"],["dc.date.accessioned","2018-11-07T08:43:43Z"],["dc.date.available","2018-11-07T08:43:43Z"],["dc.date.issued","2010"],["dc.description.abstract","An extensive survey on the cooling history by K/Ar biotite and muscovite dating of the basement rocks of the Sierras de Cordoba ( Argentina) and San Luis (Argentina) was carried out and interpreted in terms of a differential uplift history of the different blocks. Large pegmatitic muscovites from the Sierras de Cordoba record Late Cambrian to Early Ordovician ages. Beginning of cooling in the Sierra de San Luis is documented by muscovite booklets from pegmatites yielding ages between 448 Ma and 438 Ma. The limit between those age domains is marked by the Los Tuneles and Guacha Corral shear zones accommodating the vertical displacement. Constraints by K/Ar mica ages and structural observations suggest two principal phases of compression around 480 Ma and 430 Ma. The latter coincides with the final collision of the Cuyania Terrane to the western outboard of Gondwana. The Pachango Shear Zone, which cuts the Los Tuneles Shear Zone records the latest phase of ductile deformation in the Late Silurian."],["dc.identifier.doi","10.1127/0077-7749/2010/0094"],["dc.identifier.isi","000278166800009"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/20038"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0077-7749"],["dc.relation.orgunit","Abteilung Strukturgeologie und Geodynamik"],["dc.title","Post-Pampean cooling and the uplift of the Sierras Pampeanas in the west of Cordoba (Central Argentina)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]